Update supported versions

Officially drop Go 1.5 and Kafka 0.8.2. Also fix the README to correctly
reference go 1.7. Still need to test and then claim Kafka 0.10.1.

Fixes #779.

.travis.yml

@@ -1,8 +1,7 @@
 language: go
 go:
-- 1.5.4
 - 1.6.3
-- 1.7.1
+- 1.7.3
 
 env:
   global:
@@ -12,7 +11,6 @@ env:
   - KAFKA_HOSTNAME=localhost
   - DEBUG=true
   matrix:
-  - KAFKA_VERSION=0.8.2.2
   - KAFKA_VERSION=0.9.0.1
   - KAFKA_VERSION=0.10.0.1
 

README.md

@@ -18,7 +18,7 @@ Sarama is an MIT-licensed Go client library for [Apache Kafka](https://kafka.apa
 Sarama provides a "2 releases + 2 months" compatibility guarantee: we support
 the two latest stable releases of Kafka and Go, and we provide a two month
 grace period for older releases. This means we currently officially support
-Go 1.6 and 1.5, and Kafka 0.10.0, 0.9.0 and 0.8.2, although older releases are
+Go 1.7 and 1.6, and Kafka 0.10.0 and 0.9.0, although older releases are
 still likely to work.
 
 Sarama follows semantic versioning and provides API stability via the gopkg.in service.